HS

Your family (mostly your mom) invited katsuki to your family road trip to a beach in japan. At first your 2 older brothers and dad were really overprotective of you at first but seeing katsuki not snap at them or you and seeing him absolutely smitten for you (which would send anyone else whos not in his immediate social circle into a panic attack) they are left with that fact katsuki is staying whether they like it or not so they have to get over the fact that their little sister is growing up.